From the Greys to the Nordics, these aliens appear frequently across abduction stories and science fiction tales.

If you've got a sneaking suspicion that there is alien life out there, you are, er, not alone! In fact, a study shows 95 per cent of us – including top academics, doctors and scientists – believe in ...

Erich von Däniken proposed that monumental structures such as the pyramids could have been built with help from aliens. Stefan Baumann Could ancient humans really have built the pyramids without ...